Question

NONTO TRIOONOMETRY
1. In SABC right-angled at B, AB = 24 cm, BC = 7 cm. Determine
EXERCISE 8.1
sin A. cos A
a sin C. cos C
In Fig. 8.13, find tan P-cotR​

Answer 1

Answer:

sin a is p/h

which is 7/25 as hypotenuse is 25 cm using pythagoras theorem

further,cos a is 24/25

therefore, (7 x 24 )/25 is 168/25

then

sin c is equal to cos a, therefore cos a is 24/25

cos c is equal to sin a,therefore sin a is 7/25

sin c into cos c is again 168/25

Remember,if A and C are complementary

therefore sin(A) = cos(90-A)

90- A is C